Publicaties

This paper presents a comparative study between two control strategies based on the sliding mode control theory applied to a switched DC-DC Boost converter. A master-slave control structure is applied to the converter such that the inner control loop is a sliding mode current controller and the outer voltage controller is designed according to what follows. First a Proportional-Integral compensator (PI) is proposed and second, a Model Predictive ...

This brief discusses a mathematical steadystate model for fully-integrated boost and buck DC-DC converters, which takes all the significant resistive and dynamic power losses into account. The model provides a reduced calculation time by a factor 30 compared to SPICE. A 2%, or less, deviation in comparison with SPICE is achieved. The validation of the model through the measurements of both a fully-integrated boost and buck converter is ...

As most of the videos are destined for human perception, many techniques have been designed to improve video coding based on how the human visual system perceives video quality. In this paper, we propose the use of two perceptual coding techniques, namely contrast masking and texture masking, jointly operating under the High Efficiency Video Coding (HEVC) standard. These techniques aim to improve the subjective quality of the reconstructed video ...

Rare genetic diseases are a group of pathologies with often unmet clinical needs. Even if rare by a single genetic disease (from 1/2000 to 1/more than 1,000,000), the total number of patients concerned account for approximatively 400 million peoples worldwide. Finding treatments remains challenging due to the complexity of these diseases, the small number of patients and the challenge in conducting clinical trials. Therefore, innovative ...

A boost converter was constructed using a high voltage enhancement mode (E-mode) AlGaN/GaN/AlGaN DHFET transistor grown on Si<111>. The very low dynamic on-resistance (Rdyn 0.23 ohm) and very low gate-charges (e.g. Qgate 15 nC at VDS = 200 V) result in minor transistor losses. Together with a proper design of the passive components and the use of SiC diodes, very high overall efficiencies are reached. Measurements show high conversion ...

An extremely low energy per operation, single cycle 32 bit/word, 128 kb SRAM is fabricated in 90 nm CMOS. In the 850 MHz boost mode, total energy consumption is 8.4 pJ/access. This reduces to 3.6 pJ/access in the normal 480 MHz mode and bottoms out at a very aggressive 2.7 pJ/access in the 240 MHz low power mode. Several techniques were combined to obtain these performance numbers. Short buffered local bit lines reduce the impact of the cell ...

An extremely low energy/operation, single cycle 32bit/word, 128Kbit SRAM is fabricated in 90nm CMOS. In the 850MHz boost mode, energy consumption is 8.4pJ/access. This reduces to 3.6pJ/access in the normal 480MHz mode and bottoms out at a very aggressive 2.7pJ/access in the 240MHz low power mode. This performance is obtained using novel, digitally tunable sense amplifiers and a tunable timing circuit that cope gracefully with the stochastic ...

Rising global temperatures have resulted in urban heat waves in recent years, endangering residents' health and even their lives. As a result, accurate outdoor thermal comfort prediction is critical. The goal of this research is to develop highly accurate and interpretable machine learning models of outdoor thermal comfort. We created a summer outdoor thermal comfort dataset for cold regions using microclimate parameter measurements and ...

BackgroundPulmonary complications are the most common cause of death after surgery. This study aimed to derive and externally validate a novel prognostic model that can be used before elective surgery to estimate the risk of postoperative pulmonary complications and to support resource allocation and prioritisation during pandemic recovery.MethodsData from an international, prospective cohort study were used to develop a novel prognostic risk ...